clipped from: blog.wired.com   

Swords Robots have been roaming the streets of Iraq, since shortly after the war began.  Now, for the first time -- the first time in any warzone -- the machines are carrying guns. 

Swords

After years of development, three "special weapons observation remote reconnaissance direct action system" (SWORDS) robots have deployed to Iraq, armed with M249 machine guns.  The 'bots "haven't fired their weapons yet," Michael Zecca, the SWORDS program manager, tells DANGER ROOM.  "But that'll be happening soon."

Now, the SWORDS won't act on a command, unless it's received right away.  A three-part arming process -- with both physical and electronic safeties -- is required before firing.   Most importantly, the machines now come with kill switches, in case there's any odd behavior.  "So now we can kill the unit if it goes crazy," Zecca says.
only three of the robots are currently in Iraq.  Zecca says he's ready to send more, "but we don't have the money.